Fixes #52375. Removes duplicate encoding aliases returned by QgsVectorDataProvider::availableEncodings()

TurboGraphxBeige · github-actions[bot] · commit 94069987ba0a · 2023-04-24T05:25:52.000Z
diff --git a/src/core/vector/qgsvectordataprovider.cpp b/src/core/vector/qgsvectordataprovider.cpp
@@ -660,6 +660,11 @@ static bool _compareEncodings( const QString &s1, const QString &s2 )
   return s1.toLower() < s2.toLower();
 }
 
+static bool _removeDuplicateEncodings( const QString &s1, const QString &s2 )
+{
+  return ( s1.toLower() == s2.toLower() );
+}
+
 QStringList QgsVectorDataProvider::availableEncodings()
 {
   static std::once_flag initialized;
@@ -718,8 +723,10 @@ QStringList QgsVectorDataProvider::availableEncodings()
     smEncodings << "System";
 #endif
 
-    // Do case-insensitive sorting of encodings
+    // Do case-insensitive sorting of encodings then remove duplicates
     std::sort( sEncodings.begin(), sEncodings.end(), _compareEncodings );
+    const auto last = std::unique( sEncodings.begin(), sEncodings.end(), _removeDuplicateEncodings );
+    sEncodings.erase( last, sEncodings.end() );
 
   } );
 
